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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2017 dubenju@126.com.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.teapot.db;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.apache.commons.dbcp.BasicDataSourceFactory;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.teapot.db.orm.util.UTeapot;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.FileInputStream;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.sql.Connection;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.sql.PreparedStatement;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.sql.SQLException;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.Properties;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import javax.sql.DataSource;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>/**<a name="line.31"></a>
<span class="sourceLineNo">032</span> * 与数据库相关处理的类。<a name="line.32"></a>
<span class="sourceLineNo">033</span> * 通过JDBC创建或释放数据库连接。<a name="line.33"></a>
<span class="sourceLineNo">034</span> * @author dubenju@126.com<a name="line.34"></a>
<span class="sourceLineNo">035</span> * @since TeapotORM 0.0.1<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span>public class TeapotDb {<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>  private static volatile TeapotDb INSTANCE;<a name="line.39"></a>
<span class="sourceLineNo">040</span>  private String dbType = null;<a name="line.40"></a>
<span class="sourceLineNo">041</span>  private String dbServer = null;<a name="line.41"></a>
<span class="sourceLineNo">042</span>  private String dbUser = null;<a name="line.42"></a>
<span class="sourceLineNo">043</span>  private String dbPwd = null;<a name="line.43"></a>
<span class="sourceLineNo">044</span>  private String dbSchema = null;<a name="line.44"></a>
<span class="sourceLineNo">045</span>  private DataSource ds = null;<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span>  /**<a name="line.47"></a>
<span class="sourceLineNo">048</span>   * 获取实例.<a name="line.48"></a>
<span class="sourceLineNo">049</span>   * @return 实例（单实例）。<a name="line.49"></a>
<span class="sourceLineNo">050</span>   * @since 0.0.1<a name="line.50"></a>
<span class="sourceLineNo">051</span>   */<a name="line.51"></a>
<span class="sourceLineNo">052</span>  public static TeapotDb getInstance() {<a name="line.52"></a>
<span class="sourceLineNo">053</span>    if (TeapotDb.INSTANCE == null) {<a name="line.53"></a>
<span class="sourceLineNo">054</span>      synchronized (TeapotDb.class) {<a name="line.54"></a>
<span class="sourceLineNo">055</span>        if (TeapotDb.INSTANCE == null) {<a name="line.55"></a>
<span class="sourceLineNo">056</span>          TeapotDb.INSTANCE = new TeapotDb();<a name="line.56"></a>
<span class="sourceLineNo">057</span>          // 2017/08/15 因为接口参数发生变化，修改。<a name="line.57"></a>
<span class="sourceLineNo">058</span>          TeapotDb.INSTANCE.init(null);<a name="line.58"></a>
<span class="sourceLineNo">059</span>        }<a name="line.59"></a>
<span class="sourceLineNo">060</span>      }<a name="line.60"></a>
<span class="sourceLineNo">061</span>    }<a name="line.61"></a>
<span class="sourceLineNo">062</span>    return TeapotDb.INSTANCE;<a name="line.62"></a>
<span class="sourceLineNo">063</span>  }<a name="line.63"></a>
<span class="sourceLineNo">064</span><a name="line.64"></a>
<span class="sourceLineNo">065</span>  /**<a name="line.65"></a>
<span class="sourceLineNo">066</span>   * 获取实例.<a name="line.66"></a>
<span class="sourceLineNo">067</span>   * @param propFile 配置文件。<a name="line.67"></a>
<span class="sourceLineNo">068</span>   * @return 实例（单实例）。<a name="line.68"></a>
<span class="sourceLineNo">069</span>   * @since 0.0.2<a name="line.69"></a>
<span class="sourceLineNo">070</span>   * @deprecated 应该使用共享的数据。<a name="line.70"></a>
<span class="sourceLineNo">071</span>   */<a name="line.71"></a>
<span class="sourceLineNo">072</span>  public static TeapotDb getInstance(String propFile) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>    if (TeapotDb.INSTANCE == null) {<a name="line.73"></a>
<span class="sourceLineNo">074</span>      synchronized (TeapotDb.class) {<a name="line.74"></a>
<span class="sourceLineNo">075</span>        if (TeapotDb.INSTANCE == null) {<a name="line.75"></a>
<span class="sourceLineNo">076</span>          TeapotDb.INSTANCE = new TeapotDb();<a name="line.76"></a>
<span class="sourceLineNo">077</span>          TeapotDb.INSTANCE.init(propFile);<a name="line.77"></a>
<span class="sourceLineNo">078</span>        }<a name="line.78"></a>
<span class="sourceLineNo">079</span>      }<a name="line.79"></a>
<span class="sourceLineNo">080</span>    }<a name="line.80"></a>
<span class="sourceLineNo">081</span>    return TeapotDb.INSTANCE;<a name="line.81"></a>
<span class="sourceLineNo">082</span>  }<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>  /**<a name="line.84"></a>
<span class="sourceLineNo">085</span>   * 初期化处理，从属性配置文件中获取信息并实例化驱动.<a name="line.85"></a>
<span class="sourceLineNo">086</span>   * @param propFile配置文件。<a name="line.86"></a>
<span class="sourceLineNo">087</span>   * @since 0.0.1<a name="line.87"></a>
<span class="sourceLineNo">088</span>   * @since 0.0.2 2017/08/15 因为接口参数发生变化，修改。<a name="line.88"></a>
<span class="sourceLineNo">089</span>   * @deprecated 应该使用共享的数据。<a name="line.89"></a>
<span class="sourceLineNo">090</span>   */<a name="line.90"></a>
<span class="sourceLineNo">091</span>  private void init(String propFile) {<a name="line.91"></a>
<span class="sourceLineNo">092</span>    String path = UTeapot.getPath(TeapotDb.class);<a name="line.92"></a>
<span class="sourceLineNo">093</span>    String propeFile = path + "../../../../conf/Teapot_ORM.properties";<a name="line.93"></a>
<span class="sourceLineNo">094</span>    if (propFile != null &amp;&amp; propFile.length() &gt; 0) {<a name="line.94"></a>
<span class="sourceLineNo">095</span>      propeFile = propFile;<a name="line.95"></a>
<span class="sourceLineNo">096</span>    }<a name="line.96"></a>
<span class="sourceLineNo">097</span>    System.out.println("Properties File:" + propeFile);<a name="line.97"></a>
<span class="sourceLineNo">098</span>    Properties prop = new Properties();//属性集合对象<a name="line.98"></a>
<span class="sourceLineNo">099</span>    // 当前目录&gt;conf&gt;class<a name="line.99"></a>
<span class="sourceLineNo">100</span>    try {<a name="line.100"></a>
<span class="sourceLineNo">101</span>      //属性文件流<a name="line.101"></a>
<span class="sourceLineNo">102</span>      FileInputStream fis = new FileInputStream(propeFile);<a name="line.102"></a>
<span class="sourceLineNo">103</span>      prop.load(fis);//将属性文件流装载到Properties对象中<a name="line.103"></a>
<span class="sourceLineNo">104</span>      fis.close();// 关闭流<a name="line.104"></a>
<span class="sourceLineNo">105</span>    } catch (IOException ex) {<a name="line.105"></a>
<span class="sourceLineNo">106</span>      ex.printStackTrace();<a name="line.106"></a>
<span class="sourceLineNo">107</span>    }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>    String driverName = prop.getProperty("teapot.database.driver");<a name="line.109"></a>
<span class="sourceLineNo">110</span>    System.out.println("获取属性值：teapot.database.driver=" + driverName);<a name="line.110"></a>
<span class="sourceLineNo">111</span><a name="line.111"></a>
<span class="sourceLineNo">112</span>    dbType = prop.getProperty("teapot.database.type");<a name="line.112"></a>
<span class="sourceLineNo">113</span>    dbServer = prop.getProperty("teapot.database.hostname");<a name="line.113"></a>
<span class="sourceLineNo">114</span>    dbUser = prop.getProperty("teapot.database.user");<a name="line.114"></a>
<span class="sourceLineNo">115</span>    dbPwd = prop.getProperty("teapot.database.password");<a name="line.115"></a>
<span class="sourceLineNo">116</span>    dbSchema = prop.getProperty("teapot.database.schema");<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>    System.out.println("获取属性值：teapot.database.type=" + dbType);<a name="line.118"></a>
<span class="sourceLineNo">119</span>    System.out.println("获取属性值：teapot.database.hostname=" + dbServer);<a name="line.119"></a>
<span class="sourceLineNo">120</span>    System.out.println("获取属性值：teapot.database.user=" + dbUser);<a name="line.120"></a>
<span class="sourceLineNo">121</span>    System.out.println("获取属性值：teapot.database.password=" + dbPwd);<a name="line.121"></a>
<span class="sourceLineNo">122</span>    System.out.println("获取属性值：teapot.database.schema=" + dbSchema);<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span>    try {<a name="line.124"></a>
<span class="sourceLineNo">125</span>      Class.forName(driverName).newInstance();<a name="line.125"></a>
<span class="sourceLineNo">126</span>    } catch (InstantiationException e) {<a name="line.126"></a>
<span class="sourceLineNo">127</span>      e.printStackTrace();<a name="line.127"></a>
<span class="sourceLineNo">128</span>    } catch (IllegalAccessException e) {<a name="line.128"></a>
<span class="sourceLineNo">129</span>      e.printStackTrace();<a name="line.129"></a>
<span class="sourceLineNo">130</span>    } catch (ClassNotFoundException e) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>      e.printStackTrace();<a name="line.131"></a>
<span class="sourceLineNo">132</span>    }<a name="line.132"></a>
<span class="sourceLineNo">133</span>    try {<a name="line.133"></a>
<span class="sourceLineNo">134</span>      ds = BasicDataSourceFactory.createDataSource(prop);<a name="line.134"></a>
<span class="sourceLineNo">135</span>    } catch (Exception e) {<a name="line.135"></a>
<span class="sourceLineNo">136</span>      e.printStackTrace();<a name="line.136"></a>
<span class="sourceLineNo">137</span>    }<a name="line.137"></a>
<span class="sourceLineNo">138</span>  }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span>  /**<a name="line.140"></a>
<span class="sourceLineNo">141</span>   * 获取数据库连接.<a name="line.141"></a>
<span class="sourceLineNo">142</span>   * @return 获取的数据库连接。<a name="line.142"></a>
<span class="sourceLineNo">143</span>   * @throws SQLException 处理过程中发生的异常。<a name="line.143"></a>
<span class="sourceLineNo">144</span>   * @since 0.0.1<a name="line.144"></a>
<span class="sourceLineNo">145</span>   */<a name="line.145"></a>
<span class="sourceLineNo">146</span>  public TeapotDbConnection getConnection() throws SQLException {<a name="line.146"></a>
<span class="sourceLineNo">147</span>//    DriverManager.setLogWriter(new PrintWriter(System.out));<a name="line.147"></a>
<span class="sourceLineNo">148</span>    long startTime = 0;<a name="line.148"></a>
<span class="sourceLineNo">149</span>    long time1 = 0;<a name="line.149"></a>
<span class="sourceLineNo">150</span>    long time2 = 0;<a name="line.150"></a>
<span class="sourceLineNo">151</span>    long time3 = 0;<a name="line.151"></a>
<span class="sourceLineNo">152</span>    Connection conn = null;<a name="line.152"></a>
<span class="sourceLineNo">153</span>    // jdbc:mysql://localhost/teapot?user=root&amp;password=root&amp;useUnicode=true&amp;characterEncoding=utf8<a name="line.153"></a>
<span class="sourceLineNo">154</span>    // jdbc:sqlite:test.db<a name="line.154"></a>
<span class="sourceLineNo">155</span>    // jdbc:sqlite:C:/sqlite/testdb.sqlite<a name="line.155"></a>
<span class="sourceLineNo">156</span>    // jdbc:odbc:TEST<a name="line.156"></a>
<span class="sourceLineNo">157</span>    // jdbc:oracle:thin:@dbserver:1521:oracle...<a name="line.157"></a>
<span class="sourceLineNo">158</span>    // jdbc:log4jdbc:derby://localhost:1527//db-derby-10.2.2.0-bin/databases/MyDatabase<a name="line.158"></a>
<span class="sourceLineNo">159</span>    // jdbc:datadirect:oracle://server3:1521;User=test;Password=secret<a name="line.159"></a>
<span class="sourceLineNo">160</span>    startTime = System.currentTimeMillis();<a name="line.160"></a>
<span class="sourceLineNo">161</span>    StringBuffer buf = new StringBuffer();<a name="line.161"></a>
<span class="sourceLineNo">162</span>    buf.append("jdbc:");<a name="line.162"></a>
<span class="sourceLineNo">163</span>    buf.append(dbType);<a name="line.163"></a>
<span class="sourceLineNo">164</span>    if (!"sqlite".equals(dbType) &amp;&amp; !"odbc".equals(dbType)) {<a name="line.164"></a>
<span class="sourceLineNo">165</span>      buf.append("://");<a name="line.165"></a>
<span class="sourceLineNo">166</span>      buf.append(dbServer);<a name="line.166"></a>
<span class="sourceLineNo">167</span>      buf.append("/");<a name="line.167"></a>
<span class="sourceLineNo">168</span>    } else {<a name="line.168"></a>
<span class="sourceLineNo">169</span>      buf.append(":");<a name="line.169"></a>
<span class="sourceLineNo">170</span>    }<a name="line.170"></a>
<span class="sourceLineNo">171</span>    buf.append(dbSchema);<a name="line.171"></a>
<span class="sourceLineNo">172</span>    if ("mysql".equals(dbType)) {<a name="line.172"></a>
<span class="sourceLineNo">173</span>      buf.append("?user=");<a name="line.173"></a>
<span class="sourceLineNo">174</span>      buf.append(dbUser);<a name="line.174"></a>
<span class="sourceLineNo">175</span>      buf.append("&amp;password=");<a name="line.175"></a>
<span class="sourceLineNo">176</span>      buf.append(dbPwd);<a name="line.176"></a>
<span class="sourceLineNo">177</span>      buf.append("&amp;useUnicode=true&amp;characterEncoding=utf8");<a name="line.177"></a>
<span class="sourceLineNo">178</span>    }<a name="line.178"></a>
<span class="sourceLineNo">179</span>    try {<a name="line.179"></a>
<span class="sourceLineNo">180</span>      time1 = System.currentTimeMillis();<a name="line.180"></a>
<span class="sourceLineNo">181</span>//      conn = DriverManager.getConnection(buf.toString());<a name="line.181"></a>
<span class="sourceLineNo">182</span>      //从数据源中获取数据库连接<a name="line.182"></a>
<span class="sourceLineNo">183</span>      conn = ds.getConnection();<a name="line.183"></a>
<span class="sourceLineNo">184</span>      time2 = System.currentTimeMillis();<a name="line.184"></a>
<span class="sourceLineNo">185</span>      // 为了提高以后prepareStatement的速度，在此预先执行一下。<a name="line.185"></a>
<span class="sourceLineNo">186</span>      PreparedStatement ps = conn.prepareStatement("");<a name="line.186"></a>
<span class="sourceLineNo">187</span>      ps.close();<a name="line.187"></a>
<span class="sourceLineNo">188</span>      time3 = System.currentTimeMillis();<a name="line.188"></a>
<span class="sourceLineNo">189</span>    } catch (SQLException e) {<a name="line.189"></a>
<span class="sourceLineNo">190</span>      e.printStackTrace();<a name="line.190"></a>
<span class="sourceLineNo">191</span>      throw e;<a name="line.191"></a>
<span class="sourceLineNo">192</span>    }<a name="line.192"></a>
<span class="sourceLineNo">193</span>    long endTime = System.currentTimeMillis();<a name="line.193"></a>
<span class="sourceLineNo">194</span>    System.out.println("☆☆☆☆☆getConnection处理耗时" + (endTime - startTime) + "毫秒。(其中：获取连接准备："<a name="line.194"></a>
<span class="sourceLineNo">195</span>        + (time1 - startTime) + "毫秒，获取连接执行：" + (time2 - time1) + "毫秒，获取连接执行后："<a name="line.195"></a>
<span class="sourceLineNo">196</span>        + (endTime - time2) + "毫秒），" + (time3 - time2) + "毫秒）");<a name="line.196"></a>
<span class="sourceLineNo">197</span>    System.out.println();<a name="line.197"></a>
<span class="sourceLineNo">198</span>    return new TeapotDbConnection(conn);<a name="line.198"></a>
<span class="sourceLineNo">199</span>  }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span>  /**<a name="line.201"></a>
<span class="sourceLineNo">202</span>   * 释放已经获取的数据库连接.<a name="line.202"></a>
<span class="sourceLineNo">203</span>   * @param dbConn 数据库连接。<a name="line.203"></a>
<span class="sourceLineNo">204</span>   * @throws SQLException 处理过程中的异常。<a name="line.204"></a>
<span class="sourceLineNo">205</span>   * @since 0.0.1<a name="line.205"></a>
<span class="sourceLineNo">206</span>   */<a name="line.206"></a>
<span class="sourceLineNo">207</span>  public void releaseConnection(Object dbConn) throws SQLException {<a name="line.207"></a>
<span class="sourceLineNo">208</span>    if (dbConn instanceof Connection) {<a name="line.208"></a>
<span class="sourceLineNo">209</span>      ((Connection) dbConn).close();<a name="line.209"></a>
<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
<span class="sourceLineNo">211</span>  }<a name="line.211"></a>
<span class="sourceLineNo">212</span><a name="line.212"></a>
<span class="sourceLineNo">213</span>  /**<a name="line.213"></a>
<span class="sourceLineNo">214</span>   * 构造函数.<a name="line.214"></a>
<span class="sourceLineNo">215</span>   * @since 0.0.1<a name="line.215"></a>
<span class="sourceLineNo">216</span>   */<a name="line.216"></a>
<span class="sourceLineNo">217</span>  private TeapotDb() {<a name="line.217"></a>
<span class="sourceLineNo">218</span>  }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span>  /**<a name="line.220"></a>
<span class="sourceLineNo">221</span>   * 返回数据库类型.<a name="line.221"></a>
<span class="sourceLineNo">222</span>   * @return 数据库类型。<a name="line.222"></a>
<span class="sourceLineNo">223</span>   * @since 0.0.1<a name="line.223"></a>
<span class="sourceLineNo">224</span>   */<a name="line.224"></a>
<span class="sourceLineNo">225</span>  public String getDbType() {<a name="line.225"></a>
<span class="sourceLineNo">226</span>    return dbType;<a name="line.226"></a>
<span class="sourceLineNo">227</span>  }<a name="line.227"></a>
<span class="sourceLineNo">228</span>}<a name="line.228"></a>




























































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